Freaky research alert: A new study found that women tend to stop using condoms when they go on birth control. Even worse, when they go off the Pill, they don't usually start using condoms again.

For the study, researchers from Stanford University followed 1,194 sexually active women who visited Planned Parenthood for birth control. Scientists asked them how they felt about using condoms (and how their partners felt about it) and tracked them over the course of a year.

In the beginning, 36 percent said they consistently used condoms. It dropped to 27 percent three months later (after they were on birth control). And while some women stopped using hormonal birth control during the year, more than half of that group didn't use condoms after they went off the Pill.

Scarily enough, the biggest factor in whether women used condoms was their partners—if they were with a guy who wasn't that into condom use, they just didn't use them.

Okay, we get it: When you're on birth control, it doesn't seem quite as important to use condoms since you're fairly well protected on the unplanned pregnancy front. But trust us, it is. Condoms help protect you from contracting STDs. Plus, while hormonal birth control is really effective, nothing is 100 percent—condoms help give you backup and peace of mind.

And if a guy you're with isn't willing to respect that, well, clearly he doesn't have your best interests at heart.